CN102242928B - Decelerating wear-resisting device and boiler furnace equipped therewith - Google Patents
Decelerating wear-resisting device and boiler furnace equipped therewith Download PDFInfo
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- CN102242928B CN102242928B CN201110114442.5A CN201110114442A CN102242928B CN 102242928 B CN102242928 B CN 102242928B CN 201110114442 A CN201110114442 A CN 201110114442A CN 102242928 B CN102242928 B CN 102242928B
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Abstract
The invention provides a decelerating wear-resisting device and a boiler furnace with same. The decelerating wear-resisting gear comprises a plurality of decelerating wear-resisting shroud rings arranged in parallel, wherein each decelerating wear-resisting shroud rings comprises a shroud ring main body, pins and a plurality of shims; the pins are fixedly connected with the boiler furnace, and the shroud ring main body is paved on the pins; the plurality of shims are arranged between two adjacent decelerating wear-resisting shroud rings; and two ends of each shim respectively extend towards two adjacent decelerating wear-resisting shroud rings. The decelerating wear-resisting device provided by the invention can be directly arranged on the heated surface in the furnace so as to avoid large-area change of the heated surface, has lower cost, and is provided with the shims between the wear-resisting shroud rings so as to effectively eliminate edge wall flow wear and lateral turbulent flow wear of air flow; and in addition, the decelerating wear-resisting device has certain heat transmission performance per se, thereby effectively reducing the raising range of temperature at the dense phase area of a circulating fluidized bed after the device is installed.
Description
Technical field
The present invention relates to CFBB field, especially, relate to a kind of deceleration shoe.In addition, the invention still further relates to a kind of boiler furnace that comprises above-mentioned deceleration shoe.
Background technology
Adopting CFBB is that a widely used Filter Tuber For Clean Coal utilizes technology at present, has the extremely favors of power-generating enterprise of feature such as flameholding, clean environment firendly, efficient low dirt because of it.But, the restriction that is subject to CFBB inherent characteristics and uses coal, CFBB ubiquity the serious problem of heating surface wear, the harm that must take adequate measures to bring to unit operation to alleviate heating surface wear problem.
As shown in Figure 1, that has carried out studies have shown that in a large number, in the burner hearth 1 of CFBB, exist all the time center granule density low and totally move upward, Bian Bi district granule density is high and the nucleolus fluidal texture that totally moves downward, be in stove, to exist strong interior circulation and limit wall stream, this phenomenon makes that particle is reunited, sedimentation cause the alternate strong heat of gas-solid two and mass exchange, although it can strengthen furnace heat transfer and mass transport process, can cause the heating surface in burner hearth 1 to wear and tear.
Conventional method mainly adopts boss soft landing structure, allows tubular construction and metal spraying reduce heating surface wear, wherein, boss soft landing is mainly used in alleviating the wearing and tearing of cone section Fire and abrasion resistant material and upper vertical water-cooling wall intersection, after operation a period of time, boss upper water cold wall pipe still there will be serious wearing and tearing, is therefore difficult to meet the abrasionproof requirement of the CFBB that uses poor ature of coal; Make the abrasionproof effect of tubular construction relevant with boiler fluidizing velocity and cone section structure, be subject to the restriction of construction condition, run duration easily occurs that castable comes off, and not only can not alleviate wearing and tearing, also can cause the wearing and tearing aggravation of regional area; Metal spraying can alleviate wearing and tearing to a certain extent, but the CFBB for burning inferior coal (Coal Gangue Mixing ratio is large, ash content is high), abrasionproof effect is mostly not ideal enough, the abrasionproof cycle is generally no more than three months, after part of generating units spraying, there is fold, perk, large area in service comes off, and becomes new wear point.
Chinese patent application 200520118121.2 provides a kind of boiler hearth of circulating fluidized bed with shoe, the multistage layout of shoe in this burner hearth, but can not agree with mutually with the interior complicated Gas-particle Flows of stove completely, subregion (particularly four angular zones) wear protection degree is limited; The more difficult formation protection of air-flow wearing and tearing for lower furnace portion and upside; Shoe self conduction heat is limited, after the water-cooling wall of cover part, causes bed temperature to rise to some extent.
Summary of the invention
The object of the invention is to provide a kind of deceleration shoe, with solve shoe in existing circulating fluid bed boiler can not be completely with stove in complicated Gas-particle Flows agree with mutually, cause the serious technical problem of part heating surface wear.
For achieving the above object, according to an aspect of the present invention, provide a kind of deceleration shoe, having comprised: many deceleration abrasionproof shrouds that are arranged side by side, this deceleration abrasionproof shroud comprises: shroud main body; For the pin being fixedly connected with boiler furnace, shroud main body is laid on pin; A plurality of shims, are arranged between two adjacent deceleration abrasionproof shrouds, and extend to adjacent deceleration wear-resistant belt respectively at the two ends of each shim.
Further, deceleration abrasionproof shroud also comprises hexsteel, and hexsteel is fixed on pin, and shroud main body is laid on hexsteel and pin.
Further, shim is arranged continuously or step-by-step arrangement between adjacent deceleration abrasionproof shroud.
The pin in every deceleration abrasionproof shroud further, with one or more layers.
According to another aspect of the present invention, also provide a kind of boiler furnace, its inside is provided with the heating surface that comprises cooling tube and be connected in the fin between cooling tube, is provided with above-mentioned deceleration shoe on this heating surface.
Further, many deceleration abrasionproof shrouds of deceleration shoe from the top of the emulsion zone of lower furnace portion to furnace roof only along the short transverse of burner hearth with certain pitch arrangement.
Further, the following close mode thin, non-equidistance of deceleration abrasionproof shroud is arranged.
Further, the angle of deceleration abrasionproof shroud and horizontal direction is 0～90 °.
Further, shim is fixed on fin.
Further, the center line range deviation of the center line of shim and fin is less than or equal to 1 millimeter.
Further, the area coverage ratio of deceleration abrasionproof shroud on heating surface is less than or equal to 5%.
Further, every deceleration abrasionproof shroud is arranged along the circumferentially continuous or interruption of burner hearth.
The present invention has following beneficial effect:
1, between deceleration abrasionproof shroud, shim is set, can effectively eliminates limit wall stream wearing and tearing and the wearing and tearing of air-flow side direction flow-disturbing;
2, in deceleration abrasionproof shroud, hexsteel is set, can increases the intensity of shroud main body, make the installation of shroud main body more solid and reliable, not easy to wear, can play to the heating surface in burner hearth more lasting protection;
3, deceleration shoe is simple in structure, easy for installation, and easily, and deceleration abrasionproof shroud can be set directly on the heating surface in burner hearth, avoided heating surface to carry out large area change in maintenance, and cost is low;
4, deceleration abrasionproof shroud and shim have certain heat transfer property, can effectively reduce the ascensional range of bed temperature after installing.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of Gas-particle Flows mode in circulating fluid bed boiler;
Fig. 2 is the structural representation that the deceleration abrasionproof shroud of the preferred embodiment of the present invention is arranged along furnace height;
Fig. 3 is the deceleration abrasionproof shroud of the preferred embodiment of the present invention arrangement schematic diagram on curtain wall;
Fig. 4 is that the shroud main body of the preferred embodiment of the present invention is by hexsteel and the fixing structural representation of pin;
Fig. 5 is that the shroud main body section of the preferred embodiment of the present invention is trapezoidal and by hexsteel and the fixing structural representation of pin;
Fig. 6 is that the shroud main body section of the preferred embodiment of the present invention is rectangle by hexsteel and the fixing structural representation of pin;
Fig. 7 is that the shroud main body section of the preferred embodiment of the present invention is for semicircle and by hexsteel and the fixing structural representation of pin;
Fig. 8 be the shim of the preferred embodiment of the present invention be interrupted to arrange and shroud main body by the fixing side-looking structural representation of pin;
Fig. 9 be the shim of the preferred embodiment of the present invention be interrupted to arrange and shroud main body by hexsteel and the fixing side-looking structural representation of pin;
Figure 10 be the preferred embodiment of the present invention deceleration abrasionproof shroud by header sealing to through the wall box cut off with horizontal discontinuous manner arrange and shroud main body by hexsteel and the fixing side-looking structural representation of pin;
Figure 11 be the preferred embodiment of the present invention deceleration abrasionproof shroud by header sealing to through the wall box cut off with horizontal discontinuous manner arrange and shroud main body by the fixing side-looking structural representation of pin;
Figure 12 is that the deceleration abrasionproof shroud of the preferred embodiment of the present invention is cut off the main TV structure schematic diagram of arranging with horizontal discontinuous manner by header sealing to through the wall box;
Figure 13 is the shim of the invention preferred embodiment installation site schematic diagram on fin; And
Figure 14 is that the deceleration abrasionproof shroud of the preferred embodiment of the present invention is along the vertically arranged structural representation of heating surface short transverse.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
One aspect of the present invention provides a kind of deceleration shoe, and this deceleration shoe can be for protecting the heating surface in circulating fluid bed boiler.
As shown in Figure 2, Figure 3 and Figure 4, deceleration shoe comprises deceleration abrasionproof shroud 20, deceleration abrasionproof shroud 20 along the short transverse of the burner hearth 10 of CFBB with certain pitch arrangement on heating surface.Deceleration abrasionproof shroud 20 comprises shroud main body 21, pin 25, and hexsteel 23, wherein, pin 25 is welded on the water-cooling wall cooling tube 11 of formation water-cooling wall, form the curtain wall cooling tube 13 of curtain wall or be connected on the fin 12 between adjacent cooling tube, hexsteel 23 is welded on pin 25, and then shroud main body 21 is laid on hexsteel 23 and pin 25, formed the deceleration abrasionproof shroud 20 that is covered in heating surface surface.
Hexsteel 23 is conducive to the sizing of the shroud main body 21 of paste, and the expansion of hexsteel 25 is better than pin 23, and the profile construction of deceleration abrasionproof shroud 20 is also better controlled, and contributes to improve construction quality.
As shown in Fig. 5, Fig. 6 and Fig. 7, the cross section of deceleration abrasionproof shroud 20 can be trapezoidal, rectangle or semicircle, and, excessive and being heated of heating surface impacted for the volume of the abrasionproof shroud 20 that prevents from slowing down, height (thickness) and the width of deceleration abrasionproof shroud 20 are all no more than 300 millimeters.
As shown in Figure 8 and Figure 9, no matter slow down in abrasionproof shroud 20 and whether be provided with hexsteel 23, in order to eliminate the wall stream wearing and tearing of heating surface limit and the wearing and tearing of air-flow side direction flow-disturbing in burner hearth 10, between adjacent deceleration abrasionproof shroud 20, all can realize by the mode of a plurality of shims 22 is set.Shim 22 is arranged between two adjacent deceleration abrasionproof shrouds 20, and extend to two adjacent deceleration wear-resistant belts respectively at the two ends of shim 22.Shim 22 can be for cutting down lateral airflow to the washing away of water-cooling wall and curtain wall, thereby alleviate the side wear of heating surface.
Every deceleration abrasionproof shroud can be arranged along the circumferentially continuous or interruption of the heating surface in burner hearth 10.The general layout continuously that adopts, at some in particular cases, as shown in Figure 10, Figure 11 and Figure 12, the layout area of the abrasionproof shroud 20 that for example slows down has header wall pipe 30 or gaging hole, and deceleration abrasionproof shroud 20 also can be interrupted layout.
As shown in figure 13, because the width of fin 12 is less, for preventing that shim 22 is welded on the water-cooling wall cooling tube 11 or curtain wall cooling tube 13 of fin both sides, and the sidewall that prevents water-cooling wall cooling tube 11 and curtain wall cooling tube 13 is subject to wearing and tearing in various degree, the center line of shim 22 should overlap with the center line of fin 12 as far as possible, preferably, the center line range deviation of the center line of shim 22 and fin 12 should be less than or equal to 1 millimeter.
For shim 22 is more firmly welded on fin 12, the weld seam H between shim 22 and fin 12 should be greater than three millimeters.
In order to improve the service life of deceleration abrasionproof shroud 20, prevent it due to high temperature, humidity and damaged, hexsteel 23, pin 25, and shim 22 all can adopt heat-resistance stainless steel.
According to another aspect of the present invention, also provide a kind of boiler furnace, on the heating surface in this boiler furnace, be provided with above-mentioned deceleration shoe.Wherein, heating surface mainly comprises water-cooling wall cooling tube 11, curtain wall cooling tube 13, and is connected to the fin 12 between parallel adjacent cooling tube.Curtain wall comprises film heat surface, dividing waterwall heating surface, full dividing wall heating surface, overheated heating surface and hot heating surface again.In fact, from the appearance, the not significantly difference of water-cooling wall cooling tube 11 and curtain wall cooling tube 13, in Fig. 3, in order to show water-cooling wall cooling tube 11, curtain wall cooling tube 13, and the position relationship between fin 12, adopted different filling patterns to distinguish three, do not represent three's picture on surface is limited.
In accompanying drawing below, only by label, water-cooling wall cooling tube 11, curtain wall cooling tube 13 and fin 12 are distinguished, and do not recycle picture on surface, do not distinguished.
See again Fig. 2, for make heating device can be completely with stove in complicated Gas-particle Flows agree with mutually, deceleration abrasionproof shroud 20 stops full burner hearth to furnace roof 16 and arranges from emulsion zone 14 tops of burner hearth 10 bottoms of CFBB.
Deceleration abrasionproof shroud 20 both can adopt non-equidistance to arrange, also can adopt equidistant layout, the minimum arrangement pitch between adjacent deceleration abrasionproof shroud 20 is one meter, and maximum arrangement pitch is six meters.
According to the height of the overlay area of the heating surface of existing boiler, design, the layout quantity of deceleration abrasionproof shroud 20 be four to 14 comparatively suitable.
Deceleration abrasionproof shroud 20 is 0～90 degree with the angle of horizontal direction, that is to say, deceleration abrasionproof shroud 20 can be arranged along level side mutually burner hearth 10 is interior, also can vertically arrange, can also be with arbitrarily angled layout, the flexibility of installing to increase deceleration abrasionproof shroud 20, adapts to multiple chamber structure.
As shown in figure 14, when deceleration abrasionproof shroud 20 is vertically arranged, while being arranged in parallel with the short transverse of water-cooling wall cooling tube 11, the angle that belongs to deceleration abrasionproof shroud and horizontal direction is a kind of special arrangement mode of 90 degree, this kind of arrangement can, for realizing the abrasionproof of 10 4 jiaos, burner hearth, improve the abrasionproof efficiency of heating surface in all directions.
The area coverage ratio of deceleration abrasionproof shroud 20 on heating surface should be less than or equal to 5% and to reduce, the heat transfer of heating surface had a negative impact, and avoids the fluctuating widely of temperature of CFBB emulsion zone.
Enumerate several different combining forms below:
Combination 1:
Referring to Fig. 4 and Fig. 5, deceleration abrasionproof shroud 20 is by being welded on hexsteel 23 and pin 25 on fin 12, shroud main body 21 and hexsteel 23, pin 25 are fixed into and are integrated and form deceleration abrasionproof shroud 20, deceleration abrasionproof shroud 20 is arranged on water-cooling wall cooling tube 11 and curtain wall cooling tube 13, deceleration abrasionproof shroud 20 adopts non-equidistance to arrange, employing trapezoid cross section, cross section is arranged.The hexsteel 23 of deceleration abrasionproof shroud 20, pin 25 adopt heat-resistance stainless steel material, and shroud main body 21 adopts fire-resistant abrasion-proof moldable.
Combination 2:
Referring to Fig. 6, deceleration abrasionproof shroud 20 is by being welded on hexsteel 23 and pin 25 on fin 12, shroud main body 21 and hexsteel 23, pin 25 are fixed into and are integrated and form deceleration abrasionproof shroud 20, deceleration abrasionproof shroud 20 is arranged on water-cooling wall cooling tube 11, deceleration abrasionproof shroud 20 adopts non-equidistance to arrange, cross section is rectangular.The hexsteel 23 of deceleration abrasionproof shroud 20, pin 25 adopt heat-resistance stainless steel material, and shroud main body 21 adopts fire-resistant abrasion-proof castable.
Combination 3:
Referring to Fig. 7, deceleration abrasionproof shroud 20 is by being welded on hexsteel 23 and pin 25 on fin 12, shroud main body 21 and hexsteel 23, pin 25 are fixed into and are integrated and form deceleration abrasionproof shroud 20, deceleration abrasionproof shroud 20 is arranged on curtain wall cooling tube 13, deceleration abrasionproof shroud 20 adopts non-equidistance to arrange, cross section adopts semi-circular cross-section.The hexsteel 23 of deceleration abrasionproof shroud 20, pin 25 adopt heat-resistance stainless steel material, and shroud main body 21 adopts fire-resistant abrasion-proof moldable.
Combination 4:
Referring to Figure 10 and Figure 12, deceleration abrasionproof shroud 20 is welded on fin 12 by hexsteel 23 and pin 25, shroud main body 21 and hexsteel 23, pin 25 are fixed into and are integrated and form deceleration abrasionproof shroud 20, deceleration abrasionproof shroud 20 is arranged on water-cooling wall cooling tube 11, deceleration abrasionproof shroud 20 adopts to be interrupted and arranges, two ends are connected with header sealing to through the wall box 30 respectively.The hexsteel 23 of deceleration abrasionproof shroud 20, pin 25 adopt heat-resistance stainless steel material, and shroud main body 21 adopts fire-resistant abrasion-proof moldable.
Combination 5:
Referring to Figure 14, deceleration abrasionproof shroud 20 adopts and is arranged vertically.Deceleration abrasionproof shroud 20 is by being welded on pin 25 on fin 12, shroud main body 21 and pin 25 are fixed into and are integrated and form deceleration abrasionproof shroud 20, deceleration abrasionproof shroud 20 is arranged on water-cooling wall cooling tube 11, and water-cooling wall cooling tube 11 can be four jiaos of water-cooling walls.The pin 25 of deceleration abrasionproof shroud 20 adopts heat-resistance stainless steel material, and shroud main body 21 adopts fire-resistant abrasion-proof moldable.
Combination 6:
Referring to Fig. 8, pin 25 in deceleration abrasionproof shroud 20 is welded on fin 12, shroud main body 21 is fixed into and is integrated and forms deceleration abrasionproof shroud 20 with pin 25, and deceleration abrasionproof shroud 20 is arranged on water-cooling wall cooling tube 11, and the cross section of deceleration abrasionproof shroud 20 is trapezoidal.Between two-layer adjacent deceleration abrasionproof shroud 20, be furnished with for alleviating the shim 22 of air-flow side direction flow-disturbing wearing and tearing, shim 22 step-by-step arrangements.The pin 25 of deceleration abrasionproof shroud 20 and shim 22 adopt heat-resistance stainless steel material, and shroud main body 21 adopts fire-resistant abrasion-proof moldable.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a deceleration shoe, is characterized in that, comprising:
Many the deceleration abrasionproof shrouds (20) that are arranged side by side, described deceleration abrasionproof shroud (20) comprising:
Shroud main body (21);
For the pin being fixedly connected with (25) with boiler furnace, described shroud main body (21) is laid on described pin (25);
A plurality of shims (22), be arranged between adjacent two described deceleration abrasionproof shrouds (20), extend to adjacent described deceleration wear-resistant belt (20) respectively at the two ends of shim described in each (22), described shim (22) is arranged continuously or step-by-step arrangement between adjacent described deceleration abrasionproof shroud (20), described deceleration abrasionproof shroud (20) also comprises hexsteel (23), it is upper that described hexsteel (23) is fixed on described pin (25), and described shroud main body (21) is laid on described hexsteel (23) and described pin (25);
Described boiler furnace inside is provided with the heating surface that comprises cooling tube (11,13) and be connected in the fin (12) between described cooling tube (11,13), on described heating surface, be provided with described deceleration shoe, described shim (22) is fixed on described fin (12).
2. deceleration shoe according to claim 1, is characterized in that, has one or more layers described pin (25) in every described deceleration abrasionproof shroud (20).
3. a boiler furnace, its inside is provided with the heating surface that comprises cooling tube (11,13) and be connected in the fin (12) between described cooling tube (11,13), it is characterized in that, on described heating surface, be provided with deceleration shoe claimed in claim 1; Described shim (22) is fixed on described fin (12).
4. boiler furnace according to claim 3, it is characterized in that, many described deceleration abrasionproof shrouds (20) of described deceleration shoe from the top of the emulsion zone (14) of described burner hearth (10) bottom to furnace roof (16) only along the short transverse of described burner hearth (10) with certain pitch arrangement.
5. boiler furnace according to claim 4, is characterized in that, the following close mode thin, non-equidistance of described deceleration abrasionproof shroud (20) is arranged.
6. boiler furnace according to claim 3, is characterized in that, described deceleration abrasionproof shroud (20) is 0～90 ° with the angle of horizontal direction.
7. boiler furnace according to claim 3, is characterized in that, the center line range deviation of the center line of described shim (22) and described fin (12) is less than or equal to 1 millimeter.
8. boiler furnace according to claim 3, is characterized in that, the area coverage ratio of described deceleration abrasionproof shroud (20) on described heating surface is less than or equal to 5%.
9. boiler furnace according to claim 3, is characterized in that, every described deceleration abrasionproof shroud (20) is arranged along the circumferentially continuous or interruption of described burner hearth (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110114442.5A CN102242928B (en) | 2011-05-04 | 2011-05-04 | Decelerating wear-resisting device and boiler furnace equipped therewith |
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| CN201110114442.5A CN102242928B (en) | 2011-05-04 | 2011-05-04 | Decelerating wear-resisting device and boiler furnace equipped therewith |
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| CN102242928B true CN102242928B (en) | 2014-03-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103712205B (en) * | 2014-01-10 | 2015-10-28 | 哈尔滨红光锅炉总厂有限责任公司 | A kind of Circulating Fluidized Bed Hot Water Boiler preventing wearing and tearing and corrode |
| CN103742900B (en) * | 2014-01-23 | 2015-12-09 | 北京一亚高科能源科技有限公司 | A kind of Anti-abrasion water wall tube panel |
| CN106051753A (en) * | 2016-07-16 | 2016-10-26 | 广东粤电湛江生物质发电有限公司 | Internally-circulating flowing choking and buffering type biomass circulating fluidized bed |
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